Panentheism (from Greek πᾶν (pân) "all"; ἐν (en) "in"; and θεός (theós) "God"; "all-in-God") is a belief system which posits that the divine exists (be it a monotheistic God, polytheistic gods, or an eternal cosmic animating force), interpenetrates every part of nature and timelessly extends beyond it. Panentheism is differentiated from pantheism, which holds that the divine is not a distinct being or beings but is synonymous with the universe.

Simply put, in pantheism, the divine is the whole; however, in panentheism, the whole is in the divine. This means that the universe in the first formulation is practically the whole itself. In the second formulation, the universe and the divine are not ontologically equivalent. In panentheism, God is viewed as the eternal animating force behind the universe. Some versions suggest that the universe is nothing more than the manifest part of God. In some forms of panentheism, the cosmos exists within God, who in turn "pervades" or is "in" the cosmos. While pantheism asserts that God and the universe are coextensive, panentheism claims that God is greater than the universe. In addition, some forms indicate that the universe is contained within God. Much Hindu thought is highly characterized by panentheism and pantheism.